diff --git a/app/DTOs/Auth/AuthDTO.php b/app/DTOs/Auth/AuthDTO.php
index 7d9c2c4..dc318c8 100644
--- a/app/DTOs/Auth/AuthDTO.php
+++ b/app/DTOs/Auth/AuthDTO.php
@@ -10,5 +10,4 @@ abstract class AuthDTO extends CommonDTO
   {
     parent::__construct();
   }
-  abstract public function toArray();
 }
diff --git a/app/DTOs/Auth/GoogleDTO.php b/app/DTOs/Auth/GoogleDTO.php
index 152cd04..b605b19 100644
--- a/app/DTOs/Auth/GoogleDTO.php
+++ b/app/DTOs/Auth/GoogleDTO.php
@@ -15,11 +15,4 @@ class GoogleDTO extends AuthDTO
       }
     }
   }
-
-  public function toArray(): array
-  {
-    return [
-      'access_code'      => $this->access_code,
-    ];
-  }
 }
diff --git a/app/DTOs/Auth/LocalDTO.php b/app/DTOs/Auth/LocalDTO.php
index f5db587..6477e4d 100644
--- a/app/DTOs/Auth/LocalDTO.php
+++ b/app/DTOs/Auth/LocalDTO.php
@@ -16,12 +16,4 @@ class LocalDTO extends AuthDTO
       }
     }
   }
-
-  public function toArray(): array
-  {
-    return [
-      'id'      => $this->id,
-      'passwd'   => $this->passwd,
-    ];
-  }
 }
diff --git a/app/DTOs/CollectorDTO.php b/app/DTOs/CollectorDTO.php
index ab3cd1e..1fa049a 100644
--- a/app/DTOs/CollectorDTO.php
+++ b/app/DTOs/CollectorDTO.php
@@ -20,16 +20,4 @@ class CollectorDTO extends CommonDTO
       }
     }
   }
-
-  public function toArray(): array
-  {
-    return [
-      'uid'      => $this->uid,
-      'trafficinfo_uid'   => $this->trafficinfo_uid,
-      'in'   => $this->in,
-      'out'   => $this->out,
-      'raw_in'   => $this->raw_in,
-      'raw_out'   => $this->raw_out,
-    ];
-  }
 }
diff --git a/app/DTOs/CommonDTO.php b/app/DTOs/CommonDTO.php
index 9d4eeca..ffed426 100644
--- a/app/DTOs/CommonDTO.php
+++ b/app/DTOs/CommonDTO.php
@@ -18,4 +18,10 @@ abstract class CommonDTO
       "Undefined property or method: " . static::class . "::{$name}"
     );
   }
+
+  final public function toArray(): array
+  {
+    // $this가 가진 모든 public 프로퍼티와 그 값을 배열로 반환합니다.
+    return get_object_vars($this);
+  }
 }
diff --git a/app/DTOs/MylogDTO.php b/app/DTOs/MylogDTO.php
index 4df4a32..5837b16 100644
--- a/app/DTOs/MylogDTO.php
+++ b/app/DTOs/MylogDTO.php
@@ -19,15 +19,4 @@ class MylogDTO extends CommonDTO
       }
     }
   }
-
-  public function toArray(): array
-  {
-    return [
-      'uid'      => $this->uid,
-      'user_uid'      => $this->user_uid,
-      'title'   => $this->title,
-      'content'   => $this->content,
-      'status'   => $this->status,
-    ];
-  }
 }
diff --git a/app/DTOs/TrafficDTO.php b/app/DTOs/TrafficDTO.php
index 4fe0354..fea5ba9 100644
--- a/app/DTOs/TrafficDTO.php
+++ b/app/DTOs/TrafficDTO.php
@@ -22,18 +22,4 @@ class TrafficDTO extends CommonDTO
       }
     }
   }
-
-  public function toArray(): array
-  {
-    return [
-      'uid'      => $this->uid,
-      'client'   => $this->client,
-      'server'   => $this->server,
-      'server_ip'   => $this->server_ip,
-      'switch'   => $this->switch,
-      'ip'   => $this->ip,
-      'interface'   => $this->interface,
-      'status'   => $this->status,
-    ];
-  }
 }
diff --git a/app/DTOs/UserDTO.php b/app/DTOs/UserDTO.php
index 3471668..16247be 100644
--- a/app/DTOs/UserDTO.php
+++ b/app/DTOs/UserDTO.php
@@ -36,19 +36,4 @@ class UserDTO extends CommonDTO
     }
     return parent::__get($name);
   }
-
-  public function toArray(): array
-  {
-    return [
-      'uid'      => $this->uid,
-      'id'   => $this->id,
-      'passwd'   => $this->passwd,
-      'confirmpassword'   => $this->confirmpassword,
-      'name'   => $this->name,
-      'email'   => $this->email,
-      'mobile'   => $this->mobile,
-      'role' => $this->role,
-      'status' => $this->status,
-    ];
-  }
 }